Vulnerability · Published Jan 22, 2026 · Assigned by GitHub_M
CVE-2026-23992go-tuf improperly validates the configured threshold for delegations
Medium 5.9
In plain English
A medium-severity security flaw in go-tuf from theupdateframework. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
go-tuf is a Go implementation of The Update Framework (TUF). Starting in version 2.0.0 and prior to version 2.3.1, a compromised or misconfigured TUF repository can have the configured value of signature thresholds set to 0, which effectively disables signature verification. This can lead to unauthorized modification to TUF metadata files is possible at rest, or during transit as no integrity checks are made. Version 2.3.1 fixes the issue. As a workaround, always make sure that the TUF metadata roles are configured with a threshold of at least 1.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | golang-github-theupdateframework-go-tuf | no fix listed | DEBIAN-CVE-2026-23992 |
| Debian:14 | golang-github-theupdateframework-go-tuf | 2.4.1+0.7.0-1 | DEBIAN-CVE-2026-23992 |
| Go | github.com/theupdateframework/go-tuf/v2 | 2.3.1 | GHSA-fphv-w9fq-2525 |
| Go | github.com/theupdateframework/go-tuf/v2 | 2.3.1 | GO-2026-4349 |
| Ubuntu:24.04:LTS | golang-github-theupdateframework-go-tuf | no fix listed | UBUNTU-CVE-2026-23992 |
| Ubuntu:25.10 | golang-github-theupdateframework-go-tuf | no fix listed | UBUNTU-CVE-2026-23992 |
| Ubuntu:26.04:LTS | golang-github-theupdateframework-go-tuf | no fix listed | UBUNTU-CVE-2026-23992 |
| Ubuntu:26.10 | golang-github-theupdateframework-go-tuf | no fix listed | UBUNTU-CVE-2026-23992 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| theupdateframework | go-tuf | >= 2.0.0, < 2.3.1 |
Weakness: CWE-347 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N